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documentclass{article}

usepackage[utf8]{inputenc}

usepackage[english]{babel}

usepackage{amsthm}

newtheorem{theorem}{Theorem}



begin{document}

begin{theorem}

$A^2=B^2+C^2$

end{theorem}

begin{proof}

$A=1, B=1, C=0$

end{proof}



begin{theorem}

$D^2=E^2+F^2$

end{theorem}

begin{proof}[Solution]

$D=1, E=1, F=0$

end{proof}

end{document}

documentclass{article}

usepackage[utf8]{inputenc}

usepackage[english]{babel}

usepackage{amsthm}

newtheorem{theorem}{Theorem}



begin{document}

begin{theorem}

$A^2=B^2+C^2$

end{theorem}

begin{proof}

$A=1, B=1, C=0$

end{proof}



begin{theorem}

$D^2=E^2+F^2$

end{theorem}

begin{proof}[Solution]

$D=1, E=1, F=0$

end{proof}

end{document}

documentclass{article}

usepackage[utf8]{inputenc}

usepackage[english]{babel}

usepackage{amsthm}

newtheorem{theorem}{Theorem}



begin{document}

begin{theorem}

$A^2=B^2+C^2$

end{theorem}

begin{proof}

$A=1, B=1, C=0$

end{proof}



begin{theorem}

$D^2=E^2+F^2$

end{theorem}

begin{proof}[Solution]

$D=1, E=1, F=0$

end{proof}

end{document}

documentclass{article}

usepackage[utf8]{inputenc}

usepackage[english]{babel}

usepackage{amsthm}

newtheorem{theorem}{Theorem}



begin{document}

begin{theorem}

$A^2=B^2+C^2$

end{theorem}

begin{proof}

$A=1, B=1, C=0$

end{proof}



begin{theorem}

$D^2=E^2+F^2$

end{theorem}

begin{proof}[Solution]

$D=1, E=1, F=0$

end{proof}

end{document}

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